Hi guys need some opinions please.  I am looking to get a tablet but getting a bit frustrated with lack mof options for what I am after.

Basically I have a SGS2 but also company phone (nokia C5) so awkward carting 2 phones, I would like to have a tab so when out of town I have access to web for news browsing and also forums so don't see need to having SGS2. 

I need 3g xt compatibly as I'm at my mothers place a bit and she has no broadband and I'm not interested in tethering also ability to use external memory (not a space hog but like flexibility to do this). Minimum dual core 1ghz with ability to play HD 1080.  Screen size down to 7"

Thought it was a simple task and liked the Samsung Tab 10.1 but no external storage.

Enter the Asus transformer (including prime) as read good write ups on here, no 3G.

ok so next is Acer Iconia possibly A501, ticks all of the boxes except the one I saw reviewed wasn't able to use XT but that maybe just to do with site I was on.

Anyway I must be getting too picky but can't understand why you would have Tablet that doesn't have option with 3G nor one without ext memory regardless of how much is in there. 
oh last requirement is to have updates and support on android development as I will be flashing upgrades.

Any thoughts

Thanks in advance